One-Pot Breakfast Casserole

Featured in: One-Pan Power Meals

This savory one-pot breakfast casserole blends eggs, cheese, and fresh vegetables like spinach and peppers into a satisfying dish. Optional bacon adds a smoky depth, while seasonings like smoked paprika enhance flavor. Prepared quickly with simple steps, it bakes into individual muffins perfect for on-the-go mornings or meal prep. Variations include vegetarian options by omitting meat and adding extra veggies. Versatile, tasty, and convenient, it’s an ideal start to your day.

Updated on Wed, 19 Nov 2025 10:28:00 GMT
Golden-brown One-Pot Breakfast Casserole Muffins filled with savory bacon, cheese, and vegetables ready to serve. Save
Golden-brown One-Pot Breakfast Casserole Muffins filled with savory bacon, cheese, and vegetables ready to serve. | whambite.com

Savory portable breakfast muffins packed with eggs cheese and veggies are perfect for meal prep budget-friendly and delicious hot or cold.

I started making these breakfast casserole muffins when my family needed something quick for busy mornings. They have become a favorite because everyone can grab their own and eat wherever they go.

Ingredients

  • Eggs: 8 large eggs
  • Whole milk: 1/3 cup (or dairy-free alternative)
  • Baby spinach: 1 cup chopped
  • Red bell pepper: 1/2 cup diced
  • Onion: 1/2 cup finely chopped
  • Cooked bacon or breakfast sausage: 3/4 cup crumbled (omit for vegetarian)
  • Cheddar cheese: 1 cup shredded (or Monterey Jack)
  • Salt: 1/2 teaspoon
  • Black pepper: 1/4 teaspoon
  • Smoked paprika: 1/4 teaspoon
  • Olive oil or nonstick spray: 1 tablespoon (for greasing muffin tin)

Instructions

Prep Oven and Tin:
Preheat oven to 350°F (175°C). Grease a 12-cup muffin tin with olive oil or nonstick spray.
Mix Base:
In a large bowl whisk together eggs and milk until fully combined.
Add Ingredients:
Stir in spinach bell pepper onion cooked bacon or sausage (if using) cheese salt black pepper and smoked paprika.
Divide Mixture:
Divide the mixture evenly among the 12 muffin cups filling each about 3/4 full.
Bake Muffins:
Bake for 22–25 minutes or until muffins are set and lightly golden.
Cool and Serve:
Cool in the tin for 5 minutes then run a knife around the edges and remove muffins. Serve warm or allow to cool completely for storage.
A close-up of delicious, fluffy One-Pot Breakfast Casserole Muffins; egg and cheese meld beautifully. Save
A close-up of delicious, fluffy One-Pot Breakfast Casserole Muffins; egg and cheese meld beautifully. | whambite.com

My kids love helping to fill the muffin tin and choosing their favorite vegetables for each portion. It has become a fun family kitchen tradition especially for weekend brunches.

Required Tools

For this recipe you will need a 12-cup muffin tin mixing bowl whisk knife cutting board and oven.

Allergen Information

This recipe contains eggs and cheese. To make it dairy-free use plant-based milk and cheese alternatives. Pork may be present if using bacon or sausage.

Nutritional Information

Each muffin provides approximately 130 calories 9 grams fat 2 grams carbohydrates and 9 grams protein.

Freshly baked One-Pot Breakfast Casserole Muffins, with tender vegetables and cheese visible, perfect breakfast meal prep. Save
Freshly baked One-Pot Breakfast Casserole Muffins, with tender vegetables and cheese visible, perfect breakfast meal prep. | whambite.com

Enjoy these breakfast casserole muffins hot out of the oven or save them for meal prep during the week. They are just as tasty cold for a quick snack.

Kitchen Guide

Can I make this casserole vegetarian?

Yes, simply omit the bacon or sausage and add extra vegetables such as mushrooms or zucchini for a rich flavor.

What is the best way to store leftovers?

Refrigerate muffins in an airtight container for up to 4 days or freeze for up to 2 months. Reheat in the microwave or oven before serving.

Can I use dairy-free milk and cheese alternatives?

Absolutely, substitute whole milk with plant-based milk and use dairy-free cheese to accommodate dietary needs.

What type of cheese works best?

Shredded cheddar or Monterey Jack cheese provides a creamy, melty texture and rich flavor to the casserole.

How do I prevent the muffins from sticking to the tin?

Grease the muffin tin well with olive oil or use a nonstick spray before filling to ensure easy removal after baking.

One-Pot Breakfast Casserole

Savory casserole packed with eggs, cheese, and veggies, easily made in one pot for a quick morning meal.

Prep Duration
15 min
Cook Duration
25 min
Complete Duration
40 min
Created by Brandon Ellis


Skill Level Easy

Heritage American

Output 12 Portions

Diet Requirements Meat-Free, No Gluten, Keto-Friendly

What You'll Need

Base

01 8 large eggs
02 80 ml whole milk or dairy-free alternative

Vegetables

01 30 g baby spinach, chopped
02 75 g red bell pepper, diced
03 75 g onion, finely chopped

Protein (optional)

01 85 g cooked bacon or breakfast sausage, crumbled

Cheese

01 115 g shredded cheddar cheese or Monterey Jack

Seasonings

01 0.5 teaspoon salt
02 0.25 teaspoon black pepper
03 0.25 teaspoon smoked paprika

Oils

01 1 tablespoon olive oil or nonstick spray for greasing

Method

Phase 01

Preheat oven and prepare muffin tin: Preheat oven to 350°F (175°C). Grease a 12-cup muffin tin with olive oil or use nonstick spray.

Phase 02

Combine eggs and milk: In a large bowl, whisk the eggs and milk until fully blended.

Phase 03

Incorporate vegetables, protein, cheese, and seasonings: Fold in chopped spinach, diced bell pepper, chopped onion, crumbled bacon or sausage if using, shredded cheese, salt, black pepper, and smoked paprika.

Phase 04

Distribute mixture into muffin cups: Divide the mixture evenly among the 12 muffin cups, filling each approximately three-quarters full.

Phase 05

Bake until set and lightly golden: Bake for 22 to 25 minutes until the muffins are firm and lightly browned on top.

Phase 06

Cool and remove muffins: Allow the muffins to cool in the tin for 5 minutes before running a knife around edges and removing. Serve warm or cooled for storage.

Kitchen Tools

  • 12-cup muffin tin
  • Mixing bowl
  • Whisk
  • Knife and cutting board
  • Oven

Allergy Guide

Review ingredients carefully for potential allergens and seek professional medical guidance if unsure
  • Contains eggs, dairy (milk, cheese), and optionally pork.

Nutrient Breakdown (per portion)

Numbers shown are estimates only - consult healthcare providers for specific advice
  • Energy: 130
  • Fats: 9 g
  • Carbohydrates: 2 g
  • Proteins: 9 g